java - AWS S3 fetchObjects throwing error when does not exists -


i fetching objects s3 , method throws exception, when given folder not exists. how should write code provides objectlisting blank or null when folder not present.

objectlisting objectlisting = s3client.listobjects(bucketname, foldername);

can check see if exists catching exception:

public boolean exists(amazons3 s3client, string bucketname, string foldername) {   try {     s3client.getobjectmetadata(bucketname, foldername);     return true;   } catch (exception e) {     // log exception   }   return false; }

set objectlisting null if not exist

if (!exists(s3client, bucketname, foldername)) {    objectlisting = null; }

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